[Bug target/84521] aarch64: Frame-pointer corruption with __builtin_setjmp/__builtin_longjmp and -fomit-frame-pointer

[sudi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84521

--- Comment #25 from sudi at gcc dot gnu.org ---
Proposed patch. This obviously does not solve all the issues

https://gcc.gnu.org/ml/gcc-patches/2018-03/msg00668.html